I'm developing a winform program in which, I need send and receiving SMS messages, I have no problem in sending SMS, but i don't know how to inform when a new message has been received in a gsm modem? I wanna have an acknowledgement like an interrupt or event, when a new message has been received. As far as I know i should work to at+CNMI or at+CNMA, but unfortunately i cant find an example for those.Furthermore I wanna know how to get delivery message or how to handle that? Thanks in advance.
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possible duplicate of [How to inform via interrupt when a new message has been received, using AT-Commands +CNMA or +CNMI in GSM Modems?](http://stackoverflow.com/questions/16775672/how-to-inform-via-interrupt-when-a-new-message-has-been-received-using-at-comma) – hlovdal May 28 '13 at 21:53
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Depends on device type you are using. Use AT+CNMI=? to see all possible options your device supports.
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